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KATHFORD INTERNATTIONAL COLLEGEBALKUMARI, LALITPUR

WIRELESS ELECTRONIC NOTICE BOARD

USING GSM TECHNOLOGY

Prepared by:

Bishnu lamichhane

Lokendra bdr. Jargha

Saban kumar kc

Sandesh pandit

Guided by:

Bipin Timilsina

AUGUST,2013

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CHAPTER1. INTRODUCTION

CHAPTER2. TECHNICAL DETAILS

CHAPTER3. SYSTEM DESIGN & IMPLIMENTATION

CHAPTER4. EPILOUGE

PRESENTATION OUTLINE

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A BRIEF DISCRIPTION

WENB is wireless data transfer for quick display of messages in real time.

Display SMS sent from Mobile phone

Multiuser can update notices by sending SMS with password.

for a purpose of relying urgent information

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OBJECTIVES

To display the message on display board through SMS.

To effectively receive and transmit data via SMS.

To eliminate the need of being physically present to hangout the paper notices.

To provide reliable, authenticated ,user friendly display system.

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MOTIVATION

Currently we rely on putting up notices on the notice boards using papers.

Traditional display system should be reprogrammed via software to display new messages.

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BLOCKDIAGRAM

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WORKING FLOW DIAGRAM

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8-bit microcontroller

8KB on-chip Flash memory /ROM

256 bytes RAM

3 timer/counters

one serial including receiver & transmitter buffer

four 8-bit parallel programmable ports.

AT89S52 ( Atmel )

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Microcontroller-89S52

GSM MODEM –SIM300

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12V ADAPTER LINE

ANTENNA

SIM

RS232 INTERFACE

NET

WO

RK

IND

ICATO

R

AT COMMANDS

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•AT+CMGD – to delete SMSSyntax: AT+CMGD=1 -> deletes 1st sms in simcard

•AT+CMGR – to read SMSSyntax: AT+CMGR=1 -> reads 1st sms in sim

card

•AT+CMGS – to send SMSSyntax: AT+CMGS=9849093784 press enterType text”HELLO” and press ctrl+z

AT commands are used to control MODEMs

MAX232

It changes a TTL to RS232 Logic and vice versa. (TTL

Logic 0 to between +3 and +25 V) & (TTL Logic 1 to

between -3 to -25 V) 13

DISPLAY UNIT

LCD

HD44780 LCD for displaying the text data

16 character x 2 line display module

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DISPLAY UNIT

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5-DIGIT 5*7 LED MATRIX DISPLAY

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FLOW CHART

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ACEDEMIC LEVELDEMO DESIGNED

FORKATHFORD INTERNATIONAL COLLEGE

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SERVER MAN AS

MESSAGE

CONTROLLER

OTHERS

•TEACHERS

•STUDENTS

HOD SECTION

•BELX

•BCT

•BCL

PRINCIPLEEXAM

SECTION

CRs LIBRARY

NOT

AUTHENTICATED

PRINCIPLE’S MESSAGE

HELLO STUDENTS

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WHEN AUTHENTICATD SENDER SENDS A MESSAGE?

DEMO1:

LIBRARY’S MSG

BELX IV/II: QUESTION BANK IS READY

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DEMO2:

MSG FROM UNKNOWN

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WHEN UNAUTHENTICATD SENDER SENDS A MESSAGE?

DEMO3:

BEST OF LUCK

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DEMO4:

DESIGN AND SIMULATION

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SCHEMATIC DIAGRAM OF INTERFACING WITH 16*2 LCD LCD

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SCHEMATIC DIAGRAM OF INTERFACING WITH LED METRIX DISPLAY BOARD

3-8 DECODER

74LS138

4-16

DECODERS

74159

5*7

LEDMATRIX

Call control :

Data card Control :

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MERITS

User friendly : Messages are only to be typed on a mobile

Eliminates use of printers : Since we don’t use papers to display information

Faster means of transferring information : There is no delay in transmission of information.

Long Range : As long as we have the required network coverage we can send messages from any part of the world.

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DE MERITS

Dependent on signal strength : Messages are not transmitted if there is weak network coverage.

Volatile memory used for message storage : Messages last only as long as power is ON.

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APPLICATIONS & USAGES

Educational Institutions and Organizations

Advertisement

Bus Stations

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FUTURE ENHANCEMENT

Currently in our project we are using onboard RAM memory to save a single message. To overcome this shortcoming we can interface an EEPROM to save messages

The same principle can be applied to control electrical appliances at a distant location.

Robots can be controlled in a similar fashion by sending the commands to the robots.

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RESULT & CONCLUSION

Hence, we are succeed to display the text message .

Reliable, Authenticated & User friendly display system.

Finally, Project helped us to implement the theoretical principles learned during the four years course

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SNAPSHOT OF OUR SYSTEM

MICROCONTROLLER

89S52

RS232 INTERFACE

POWER SUPPLY

MAX232

GSM MODEM-SIM300

16*2 LCD DISPLAY

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SNAPSHOT OF OUR SYSTEM

MICROCONTROLLER

89S52

RS232 INTERFACE

POWER SUPPLY

MAX232

GSM MODEM-SIM300

16*2 LCD DISPLAY

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REFERENCES

http://en.wikipedia.org/

http://www.atmel.com/

http://images.google.com/

http://www.datasheetcatalog.com

http://www.keil.com/forum/docs

Datasheet: SIM 300 GSM MODEM Manual

Datasheet: ATMEL 89S52 Microcontroller

Datasheet: LCD HD44780

Datasheet: MAX 232

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THANKYOU!